Except trains that have a reversal at ASN, all other trains going towards burnpur arrive on pf 3 & 4 only.
OK let your logic be considered that diversion will change its pf no, then tell me how trains like GHY MS exp, vivek exp, DBRG ms exp arrive on pf4, these trains also follow the same route from andal to burnpurn, then according to your reason they should not have arrived on pf 3or 4, isn't it???